sd breakout

Archive SparkFun Site Questions/Comments
1

Hi, The schematic I;m following, has different names for the ports on its SD card breakout board to the ones on my breakout board.

I have:

CS

DI

VCC

CLK

GND

DO

IRQ

P9

CD

WP

COM

It has: (the part after the - is where they are to be conected)

CS - CS

SI - MOSI

VSS1 - GND

VDD - VCC

SCLK - SCLK

VSS2 - GND

SO - MISO

RSV -

RSV -

So I have connected mine up as follows

CS - CS

DI - MOSI

VCC - VCC

CLK - SCLK

GND - GND

DO - MISO

IRQ

P9

CD

WP

COM

The other ones I couldnt find a common meaning for. Do you know where they should go?

If no one knows does anyone know how i could find out?

Thanks

ALex

2

IRQ is likely an interrupt (maybe used to let you know when a slow operation is finished?)

WP is probably write protect. RSV may be reserved

Just some guesses.

3

P9 has no meaning in SPI mode. It is one of the data lines in nibble mode.

http://www.interfacebus.com/Secure_Digi … inout.html

CD is probably Card Detect.

4

so there is only one i need to connect left, because two are unused. does anyone know which it is?

thanks